1129716020161 has 3 divisors (see below), whose sum is σ = 1129717083043. Its totient is φ = 1129714957280.

The previous prime is 1129716020123. The next prime is 1129716020291. The reversal of 1129716020161 is 1610206179211.

The square root of 1129716020161 is 1062881.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1003264660161 + 126451360000 = 1001631^2 + 355600^2 .

It is not a de Polignac number, because 1129716020161 - 2¹⁷ = 1129715889089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129716020161.

It is not an unprimeable number, because it can be changed into a prime (1129716020861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 531441 + ... + 1594321.

Almost surely, 2^{1129716020161} is an apocalyptic number.

1129716020161 is the 1062881-st square number.

1129716020161 is the 531441-st centered octagonal number.

It is an amenable number.

1129716020161 is a deficient number, since it is larger than the sum of its proper divisors (1062882).

1129716020161 is an frugal number, since it uses more digits than its factorization.

1129716020161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125762 (or 1062881 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 1129716020161 in words is "one trillion, one hundred twenty-nine billion, seven hundred sixteen million, twenty thousand, one hundred sixty-one".